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Reverse engineer challenge3.exe on the target mach...

Created on: August 25, 2026

Answered using GPT-5.6 Thinking by Chat01

Question

challenge3.exe

Reverse engineer challenge3.exe on the target machine with the IP address 172.25.65.103 and identify the standard algorithm implemented by the membership validation function.(Answer Format: Xxxx Xxxxxxxxx)
it a typical ctf we have to find the answer

Thought

Inspected binary strings, cross-references, and Luhn validation assembly

Worked for 1m 21s

Answer

Luhn Algorithm

Question

for the same exe Analyze the fiile challenge3.exe and determine the hexadecimal value used as the divisor in its final checksum validation on the machine with the IP address 172.25.65.103.(Answer Format: NxNX)

Thought

Inspected executable metadata, unpacked strings, and traced Luhn validation logic

Worked for 22s

Answer

0x0A

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